Circular slide rule. Silver plated and blued metal. Double white spere. 1960's. URSS

€ 90,0090.00

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Description

Rare pocket circular mechanical slide rule.

URSS. Circa: 1960's.

Silver plated and blued metal. Double crown and two white dials.

Black arabic numerals and red hands.

Five scales (division, multiplication, trigonometric functions...).

More information

Fine condition. Work well. Normal wear use for its age.

Measures: 5 cm diameter, without crowns, and 0,7 cm thickness.

Weight: 40 grams.

Antique office collectibles.

Technical antiques. Calculators and adding machines.

Pocket mechanical slide rules.

Antique machines and old instruments.

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